plomlompom.com Git - plomtask/blob - plomtask/todos.py

   1 """Actionables."""
   2 from __future__ import annotations
   3 from dataclasses import dataclass
   4 from typing import Any
   5 from sqlite3 import Row
   6 from plomtask.db import DatabaseConnection, BaseModel
   7 from plomtask.processes import Process
   8 from plomtask.versioned_attributes import VersionedAttribute
   9 from plomtask.conditions import Condition, ConditionsRelations
  10 from plomtask.exceptions import (NotFoundException, BadFormatException,
  11                                  HandledException)
  12
  13
  14 @dataclass
  15 class TodoNode:
  16     """Collects what's useful to know for Todo/Condition tree display."""
  17     todo: Todo
  18     seen: bool
  19     children: list[TodoNode]
  20
  21
  22 class Todo(BaseModel[int], ConditionsRelations):
  23     """Individual actionable."""
  24     # pylint: disable=too-many-instance-attributes
  25     table_name = 'todos'
  26     to_save = ['process_id', 'is_done', 'date', 'comment', 'effort',
  27                'calendarize']
  28     to_save_relations = [('todo_conditions', 'todo', 'conditions'),
  29                          ('todo_blockers', 'todo', 'blockers'),
  30                          ('todo_enables', 'todo', 'enables'),
  31                          ('todo_disables', 'todo', 'disables'),
  32                          ('todo_children', 'parent', 'children'),
  33                          ('todo_children', 'child', 'parents')]
  34     to_search = ['comment']
  35
  36     # pylint: disable=too-many-arguments
  37     def __init__(self, id_: int | None,
  38                  process: Process,
  39                  is_done: bool,
  40                  date: str, comment: str = '',
  41                  effort: None | float = None,
  42                  calendarize: bool = False) -> None:
  43         BaseModel.__init__(self, id_)
  44         ConditionsRelations.__init__(self)
  45         if process.id_ is None:
  46             raise NotFoundException('Process of Todo without ID (not saved?)')
  47         self.process = process
  48         self._is_done = is_done
  49         self.date = date
  50         self.comment = comment
  51         self.effort = effort
  52         self.children: list[Todo] = []
  53         self.parents: list[Todo] = []
  54         self.calendarize = calendarize
  55         if not self.id_:
  56             self.calendarize = self.process.calendarize
  57             self.conditions = self.process.conditions[:]
  58             self.blockers = self.process.blockers[:]
  59             self.enables = self.process.enables[:]
  60             self.disables = self.process.disables[:]
  61
  62     @classmethod
  63     def create_with_children(cls, db_conn: DatabaseConnection, date: str,
  64                              process_ids: list[int]) -> list[Todo]:
  65         """Create Todos of process_ids for date, ensure children."""
  66         new_todos = []
  67         for process_id in process_ids:
  68             process = Process.by_id(db_conn, process_id)
  69             todo = Todo(None, process, False, date)
  70             todo.save(db_conn)
  71             new_todos += [todo]
  72         nothing_to_adopt = False
  73         while not nothing_to_adopt:
  74             nothing_to_adopt = True
  75             existing_todos = Todo.by_date(db_conn, date)
  76             for todo in new_todos:
  77                 if todo.adopt_from(existing_todos):
  78                     nothing_to_adopt = False
  79                 todo.make_missing_children(db_conn)
  80                 todo.save(db_conn)
  81         return new_todos
  82
  83     @classmethod
  84     def from_table_row(cls, db_conn: DatabaseConnection,
  85                        row: Row | list[Any]) -> Todo:
  86         """Make from DB row, with dependencies."""
  87         if row[1] == 0:
  88             raise NotFoundException('calling Todo of '
  89                                     'unsaved Process')
  90         row_as_list = list(row)
  91         row_as_list[1] = Process.by_id(db_conn, row[1])
  92         todo = super().from_table_row(db_conn, row_as_list)
  93         assert isinstance(todo.id_, int)
  94         for t_id in db_conn.column_where('todo_children', 'child',
  95                                          'parent', todo.id_):
  96             # pylint: disable=no-member
  97             todo.children += [cls.by_id(db_conn, t_id)]
  98         for t_id in db_conn.column_where('todo_children', 'parent',
  99                                          'child', todo.id_):
 100             # pylint: disable=no-member
 101             todo.parents += [cls.by_id(db_conn, t_id)]
 102         for name in ('conditions', 'blockers', 'enables', 'disables'):
 103             table = f'todo_{name}'
 104             assert isinstance(todo.id_, int)
 105             for cond_id in db_conn.column_where(table, 'condition',
 106                                                 'todo', todo.id_):
 107                 target = getattr(todo, name)
 108                 target += [Condition.by_id(db_conn, cond_id)]
 109         return todo
 110
 111     @classmethod
 112     def by_process_id(cls, db_conn: DatabaseConnection,
 113                       process_id: int | None) -> list[Todo]:
 114         """Collect all Todos of Process of process_id."""
 115         return [t for t in cls.all(db_conn) if t.process.id_ == process_id]
 116
 117     @classmethod
 118     def by_date(cls, db_conn: DatabaseConnection, date: str) -> list[Todo]:
 119         """Collect all Todos for Day of date."""
 120         todos = []
 121         for id_ in db_conn.column_where('todos', 'id', 'day', date):
 122             todos += [cls.by_id(db_conn, id_)]
 123         return todos
 124
 125     @property
 126     def is_doable(self) -> bool:
 127         """Decide whether .is_done settable based on children, Conditions."""
 128         for child in self.children:
 129             if not child.is_done:
 130                 return False
 131         for condition in self.conditions:
 132             if not condition.is_active:
 133                 return False
 134         for condition in self.blockers:
 135             if condition.is_active:
 136                 return False
 137         return True
 138
 139     @property
 140     def is_deletable(self) -> bool:
 141         """Decide whether self be deletable (not if preserve-worthy values)."""
 142         if self.comment:
 143             return False
 144         if self.effort and self.effort >= 0:
 145             return False
 146         return True
 147
 148     @property
 149     def process_id(self) -> int | str | None:
 150         """Needed for super().save to save Processes as attributes."""
 151         return self.process.id_
 152
 153     @property
 154     def unsatisfied_dependencies(self) -> list[int]:
 155         """Return Process IDs of .process.explicit_steps not in .children."""
 156         unsatisfied = [s.step_process_id for s in self.process.explicit_steps
 157                        if s.parent_step_id is None]
 158         for child_process_id in [c.process.id_ for c in self.children]:
 159             if child_process_id in unsatisfied:
 160                 unsatisfied.remove(child_process_id)
 161         return unsatisfied
 162
 163     @property
 164     def is_done(self) -> bool:
 165         """Wrapper around self._is_done so we can control its setter."""
 166         return self._is_done
 167
 168     @is_done.setter
 169     def is_done(self, value: bool) -> None:
 170         if value != self.is_done and not self.is_doable:
 171             raise BadFormatException('cannot change doneness of undoable Todo')
 172         if self._is_done != value:
 173             self._is_done = value
 174             if value is True:
 175                 for condition in self.enables:
 176                     condition.is_active = True
 177                 for condition in self.disables:
 178                     condition.is_active = False
 179
 180     @property
 181     def title(self) -> VersionedAttribute:
 182         """Shortcut to .process.title."""
 183         return self.process.title
 184
 185     def adopt_from(self, todos: list[Todo]) -> bool:
 186         """As far as possible, fill unsatisfied dependencies from todos."""
 187         adopted = False
 188         for process_id in self.unsatisfied_dependencies:
 189             for todo in [t for t in todos if t.process.id_ == process_id
 190                          and t not in self.children]:
 191                 self.add_child(todo)
 192                 adopted = True
 193                 break
 194         return adopted
 195
 196     def make_missing_children(self, db_conn: DatabaseConnection) -> None:
 197         """Fill unsatisfied dependencies with new Todos."""
 198         new_todos = self.__class__.create_with_children(
 199                 db_conn, self.date, self.unsatisfied_dependencies)
 200         for todo in new_todos:
 201             self.add_child(todo)
 202
 203     def get_step_tree(self, seen_todos: set[int]) -> TodoNode:
 204         """Return tree of depended-on Todos."""
 205
 206         def make_node(todo: Todo) -> TodoNode:
 207             children = []
 208             seen = todo.id_ in seen_todos
 209             assert isinstance(todo.id_, int)
 210             seen_todos.add(todo.id_)
 211             for child in todo.children:
 212                 children += [make_node(child)]
 213             return TodoNode(todo, seen, children)
 214
 215         return make_node(self)
 216
 217     def add_child(self, child: Todo) -> None:
 218         """Add child to self.children, avoid recursion, update parenthoods."""
 219
 220         def walk_steps(node: Todo) -> None:
 221             if node.id_ == self.id_:
 222                 raise BadFormatException('bad child choice causes recursion')
 223             for child in node.children:
 224                 walk_steps(child)
 225
 226         if self.id_ is None:
 227             raise HandledException('Can only add children to saved Todos.')
 228         if child.id_ is None:
 229             raise HandledException('Can only add saved children to Todos.')
 230         if child in self.children:
 231             raise BadFormatException('cannot adopt same child twice')
 232         walk_steps(child)
 233         self.children += [child]
 234         child.parents += [self]
 235
 236     def remove_child(self, child: Todo) -> None:
 237         """Remove child from self.children, update counter relations."""
 238         if child not in self.children:
 239             raise HandledException('Cannot remove un-parented child.')
 240         self.children.remove(child)
 241         child.parents.remove(self)
 242
 243     def save(self, db_conn: DatabaseConnection) -> None:
 244         """On save calls, also check if auto-deletion by effort < 0."""
 245         if self.effort and self.effort < 0 and self.is_deletable:
 246             self.remove(db_conn)
 247             return
 248         super().save(db_conn)
 249
 250     def remove(self, db_conn: DatabaseConnection) -> None:
 251         """Remove from DB, including relations."""
 252         if not self.is_deletable:
 253             raise HandledException('Cannot remove non-deletable Todo.')
 254         children_to_remove = self.children[:]
 255         parents_to_remove = self.parents[:]
 256         for child in children_to_remove:
 257             self.remove_child(child)
 258         for parent in parents_to_remove:
 259             parent.remove_child(self)
 260         super().remove(db_conn)